1. V. B. Golubev, E. V. Lunina, and A. K. Selivanovskii,Usp. Khim., 1981,50, 792 [Russ. Chem. Rev., 1981,50 (Engl. Transl.)].
2. V. A. Radzig,Kinet. katal., 1983,24, 173 [Kinet. Catal., 1983,24 (Engl. Transl.)].
3. A. L. Buchachenko and A. M. Vasserman,Stabil'nye radicaly. Electronnoe stroenie, reaktsyonnaya sposobnost' i primenenie [Stable Radicals. Electronic Structure, Reactivity, and Applications], Khimiya, Moscow, 1973 (in Russian).
4. J. H. Freed and G. K. Fraenkel,J. Chem. Phys., 1963,39, 326.
5. A. Carrington and A. D. McLachlan,Introduction to Magnetic Resonance with Applications to Chemistry and Chemical Physics, Harper and Row, New York-Evanston-London, 1967.